<!DOCTYPE html>
<html lang="en">

<head>
	<meta charset="UTF-8">
	<title>1_非受控组件</title>
</head>

<body>
	<!-- 准备好一个“容器” -->
	<div id="test"></div>

	<!-- 引入react核心库 -->
	<script type="text/javascript" src="../js/react.development.js"></script>
	<!-- 引入react-dom，用于支持react操作DOM -->
	<script type="text/javascript" src="../js/react-dom.development.js"></script>
	<!-- 引入babel，用于将jsx转为js -->
	<script type="text/javascript" src="../js/babel.min.js"></script>

	<script type="text/babel">
		//创建组件   默认情况下，表单元素为非受控组件。
		class Login extends React.Component {
			handleSubmit = (event) => {
				event.preventDefault ? event.preventDefault() : event.returnValue = false; //阻止表单提交
				const { username, password } = this
				alert(`你输入的用户名是：${username.value},你输入的密码是：${password.value}`)
			}
			render() {
				return (
					<form onSubmit={this.handleSubmit}>
						用户名：<input ref={c => this.username = c} type="text" name="username" />
						密码：<input ref={c => this.password = c} type="password" name="password" />
						<button>登录</button>
					</form>
				)
			}
		}
		//渲染组件
		ReactDOM.render(<Login />, document.getElementById('test'))
	</script>
</body>

</html>